Fleursdumal
फूल की बुराई
Causa il tempo l'asian rust potrebbe estendersi a nuove aree del sud-est americano, iniziano a preoccuparsi seriamente
DJ FOCUS: US Center Warns Of Serious Asian Soy Rust Threat
By Gary Wulf
Of DOW JONES NEWSWIRES
CENTRAL CITY, Neb. (Dow Jones)--The North American Plant Disease Forecast
Center at North Carolina State University said late Monday that current
weather conditions have created a serious threat of spreading the devastating
Asian soybean rust fungus to new areas of the Southeast.
Pasco County, Florida, the only area of the continental U.S. known to
harbor the fungus thus far in 2005, was the scene of overcast skies and
northwesterly winds Monday.
The agency called conditions "highly favorable" for spore survival. "Spores
will most likely have the chance to become airborne before the next weather
maker moves into the area," the agency said.
The "weather maker" being referred to is a storm, tracking eastward out of
the southern Plains, which is expected to produce widespread precipitation
across the Southeast this week.
Possible heavy rain will deposit airborne spores in the afternoon and late
night hours of Tuesday, warned the center.
Airflow trajectories suggest a "strongly moderate," or 60%-80%, risk of
fungal infection for susceptible plants in all of central and northern
Florida - including the Florida Panhandle - central and southern Georgia and
eastern Alabama.
Risks are calculated as "moderate," or a 40%-60% chance of infection, for
prospective host plants in northern Georgia and the eastern Carolinas.
Experts estimate that an acre of soybeans infected with Asian rust fungus
can generate a trillion new spores, each capable of spreading the infection
up to 300 miles daily, under favorable weather and wind conditions. The
disease can easily reduce soybean yields by as much as 80%, by defoliating
plants, reducing pod set and decreasing soybean test weight.
The agency releases official rust forecasts three times weekly - on Monday,
Wednesday and Friday afternoons.
Rust Sentinels
Although the center is the only official government agency currently
forecasting the potential for Asian soybean to spread, a comprehensive
network of agronomic watchdogs, called the National Soybean Rust Sentinel and
Monitoring Network, has been created to do the day-to-day detective work of
uncovering any new infections which may actually occur.
The cooperative effort, undertaken by the North Central Soybean Research
Program, the United Soybean Board and several federal agencies, will
establish "sentinel plots" of soybeans across the Deep South, Midwest and
Great Plains.
"We'll have trained experts on the ground in all the major soybean-
producing states, monitoring local sentinel plots and feeding information to
a centralized data bank," said David Wright director of the NCSRP's Plant
Health Initiative program. "Controlling ASR (Asian soybean rust) is paramount
to profitable soybean production."
Data gathered from the plots will be used to crate timely, state-specific
risk assessments, which will be published on the official USDA soybean rust
Web site at http://www.usda.gov/soybeanrust and the Plant Health Initiative
site at http://www.planthealth.info/.
The soybean sentinel plot program was devised and is being coordinated by
X.B. Yang, professor and plant pathologist at Iowa State University. It will
be supported by funding from the national soybean checkoff program and
private industry. USDA agencies cooperating in the effort include the Animal
and Plant Health Inspection Service, Agricultural Research Service and
Cooperative State Research, Education and Extension Service.
Plots will be located at university research fields or grower fields,
seeded 15-25 days prior to normal planting times and monitored every three to
seven days. If Asian soybean rust spores are present, disease symptoms will
begin appearing in earlier-maturing sentinel plots before occurring in acres
planted on a more traditional planting schedule, creating an early warning
system which will give local producers a window of opportunity to make
decisions regarding possible fungicide applications.
Once the disease is identified in a sentinel plot, plant samples will be
sent to the USDA for immediate verification and announced to the public.
"The goal is to let producers know how rust is progressing, so they can
plan ahead and be ready to apply the appropriate fungicide at the appropriate
time," said NCSRP Board President and Weston, Neb., soybean farmer Gregg
Fujan.
Most states are planning numerous sentinel plots - such as Virginia, where
as many as 100 fields will be monitored - and Kentucky, where at least 20 are
being established in the largest soybean-growing regions of the state.
"We want producers to feel comfortable in that we are doing all we can to
prepare for the possible onset of this disease," said Don Hershman, plant
pathologist with the University of Kentucky College of Agriculture.
The plots will be planted in mid- to late April, which is two to four weeks
ahead of the normal planting schedule for soybeans in Kentucky.
"The point is, they need to be planted early with an early maturing variety
in order to get the plants to canopy as quickly as possible, which encourages
soybean rust development if the spores are in the area," Hershman said. "The
whole point of a sentinel plot is to detect soybean rust if it is in the area
as soon as possible."
Sentinel plots have already proven their worth in providing South American
farmers with early warnings of local Asian soybean rust infections, with more
than 1,000 established in Brazil alone, this season.
Background
Asian soybean rust is one of the world's most destructive plant diseases,
normally infecting soybeans from the flowering to full seed stage of
development, encompassing the months of July and August in the core of the
U.S. Midwest.
An analysis done by APHIS found that all areas of the U.S. soybean belt
stand at least a 50% chance of contracting soybean rust annually, with that
risk rising to about 70%-100% for fields east of the Mississippi River.
DJ FOCUS: US Center Warns Of Serious Asian Soy Rust Threat
By Gary Wulf
Of DOW JONES NEWSWIRES
CENTRAL CITY, Neb. (Dow Jones)--The North American Plant Disease Forecast
Center at North Carolina State University said late Monday that current
weather conditions have created a serious threat of spreading the devastating
Asian soybean rust fungus to new areas of the Southeast.
Pasco County, Florida, the only area of the continental U.S. known to
harbor the fungus thus far in 2005, was the scene of overcast skies and
northwesterly winds Monday.
The agency called conditions "highly favorable" for spore survival. "Spores
will most likely have the chance to become airborne before the next weather
maker moves into the area," the agency said.
The "weather maker" being referred to is a storm, tracking eastward out of
the southern Plains, which is expected to produce widespread precipitation
across the Southeast this week.
Possible heavy rain will deposit airborne spores in the afternoon and late
night hours of Tuesday, warned the center.
Airflow trajectories suggest a "strongly moderate," or 60%-80%, risk of
fungal infection for susceptible plants in all of central and northern
Florida - including the Florida Panhandle - central and southern Georgia and
eastern Alabama.
Risks are calculated as "moderate," or a 40%-60% chance of infection, for
prospective host plants in northern Georgia and the eastern Carolinas.
Experts estimate that an acre of soybeans infected with Asian rust fungus
can generate a trillion new spores, each capable of spreading the infection
up to 300 miles daily, under favorable weather and wind conditions. The
disease can easily reduce soybean yields by as much as 80%, by defoliating
plants, reducing pod set and decreasing soybean test weight.
The agency releases official rust forecasts three times weekly - on Monday,
Wednesday and Friday afternoons.
Rust Sentinels
Although the center is the only official government agency currently
forecasting the potential for Asian soybean to spread, a comprehensive
network of agronomic watchdogs, called the National Soybean Rust Sentinel and
Monitoring Network, has been created to do the day-to-day detective work of
uncovering any new infections which may actually occur.
The cooperative effort, undertaken by the North Central Soybean Research
Program, the United Soybean Board and several federal agencies, will
establish "sentinel plots" of soybeans across the Deep South, Midwest and
Great Plains.
"We'll have trained experts on the ground in all the major soybean-
producing states, monitoring local sentinel plots and feeding information to
a centralized data bank," said David Wright director of the NCSRP's Plant
Health Initiative program. "Controlling ASR (Asian soybean rust) is paramount
to profitable soybean production."
Data gathered from the plots will be used to crate timely, state-specific
risk assessments, which will be published on the official USDA soybean rust
Web site at http://www.usda.gov/soybeanrust and the Plant Health Initiative
site at http://www.planthealth.info/.
The soybean sentinel plot program was devised and is being coordinated by
X.B. Yang, professor and plant pathologist at Iowa State University. It will
be supported by funding from the national soybean checkoff program and
private industry. USDA agencies cooperating in the effort include the Animal
and Plant Health Inspection Service, Agricultural Research Service and
Cooperative State Research, Education and Extension Service.
Plots will be located at university research fields or grower fields,
seeded 15-25 days prior to normal planting times and monitored every three to
seven days. If Asian soybean rust spores are present, disease symptoms will
begin appearing in earlier-maturing sentinel plots before occurring in acres
planted on a more traditional planting schedule, creating an early warning
system which will give local producers a window of opportunity to make
decisions regarding possible fungicide applications.
Once the disease is identified in a sentinel plot, plant samples will be
sent to the USDA for immediate verification and announced to the public.
"The goal is to let producers know how rust is progressing, so they can
plan ahead and be ready to apply the appropriate fungicide at the appropriate
time," said NCSRP Board President and Weston, Neb., soybean farmer Gregg
Fujan.
Most states are planning numerous sentinel plots - such as Virginia, where
as many as 100 fields will be monitored - and Kentucky, where at least 20 are
being established in the largest soybean-growing regions of the state.
"We want producers to feel comfortable in that we are doing all we can to
prepare for the possible onset of this disease," said Don Hershman, plant
pathologist with the University of Kentucky College of Agriculture.
The plots will be planted in mid- to late April, which is two to four weeks
ahead of the normal planting schedule for soybeans in Kentucky.
"The point is, they need to be planted early with an early maturing variety
in order to get the plants to canopy as quickly as possible, which encourages
soybean rust development if the spores are in the area," Hershman said. "The
whole point of a sentinel plot is to detect soybean rust if it is in the area
as soon as possible."
Sentinel plots have already proven their worth in providing South American
farmers with early warnings of local Asian soybean rust infections, with more
than 1,000 established in Brazil alone, this season.
Background
Asian soybean rust is one of the world's most destructive plant diseases,
normally infecting soybeans from the flowering to full seed stage of
development, encompassing the months of July and August in the core of the
U.S. Midwest.
An analysis done by APHIS found that all areas of the U.S. soybean belt
stand at least a 50% chance of contracting soybean rust annually, with that
risk rising to about 70%-100% for fields east of the Mississippi River.
con due candelacce verdi aveva rotto la flag rialzista dopo una formazione lunghissima , oggi ritraccia sulla trimestrale
asile,a settembre piu' dettagli su mercato funghicidi Usa